Wall lamp



FIG. 1 is a front perspective view of a wall lamp, showing my new design;

FIG. 2 is a front view of my design;

FIG. 3 is back view of my design;

FIG. 4 is a left side view of my design;

FIG. 5 is a right side view of my design;

FIG. 6 is a top view of my design; and,

FIG. 7 is a bottom view of my design. 

I claim, the ornamental design for a wall lamp, as shown and described. 